B737 overtakes DC9 on departure after mci xfers both aircraft to ZKC.

Attributes
ACN	496820
Time
Date	200012
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mci.airport
State Reference	MO
Altitude	msl single value : 15000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zkc.artcc tracon : mci.tracon
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Route In Use	departure : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zkc.artcc tracon : mci.tracon
Operator	common carrier : air carrier
Make Model Name	DC-9 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Route In Use	departure : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Experience	controller radar : 23
ASRS Report	496820
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	atc equipment : conflict alert aircraft equipment : tcas other flight crewa
Resolutory Action	controller : issued new clearance flight crew : took precautionary avoidance action
Consequence	faa : investigated
Miss Distance	horizontal : 18000 vertical : 300
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Air carrier Y departed mci, vectored onto departure procedure, climbed to 15000 ft, xferred to ZKC leaving 6000 ft on vector to intercept transition. Air carrier X departed, vectored to same departure procedure as air carrier Y. Climbed air carrier X to 15000 ft, gave vector to intercept departure procedure. Air carrier Y climbed very slowly and did not accelerate leaving 10000 ft. Air carrier X climbed fast and, leaving 10000 ft, went to what looked like maximum speed. Air carrier X closed on air carrier Y. I xferred air carrier X to ZKC because at the time it looked like plenty of separation between the 2 jets. ZKC did not climb either aircraft like they normally do. Air carrier X got 3 mi in trail of air carrier Y at same altitude, 15000 ft. Air carrier X was able to apply visual separation and continued to climb. I did not expect air carrier Y to be so slow climbing and he did not go as fast as a DC9 does normally. Minimum separation achieved. Should not have happened, but did.

Original NASA ASRS Text

Title: B737 OVERTAKES DC9 ON DEP AFTER MCI XFERS BOTH ACFT TO ZKC.

Narrative: ACR Y DEPARTED MCI, VECTORED ONTO DEP PROC, CLBED TO 15000 FT, XFERRED TO ZKC LEAVING 6000 FT ON VECTOR TO INTERCEPT TRANSITION. ACR X DEPARTED, VECTORED TO SAME DEP PROC AS ACR Y. CLBED ACR X TO 15000 FT, GAVE VECTOR TO INTERCEPT DEP PROC. ACR Y CLBED VERY SLOWLY AND DID NOT ACCELERATE LEAVING 10000 FT. ACR X CLBED FAST AND, LEAVING 10000 FT, WENT TO WHAT LOOKED LIKE MAX SPD. ACR X CLOSED ON ACR Y. I XFERRED ACR X TO ZKC BECAUSE AT THE TIME IT LOOKED LIKE PLENTY OF SEPARATION BTWN THE 2 JETS. ZKC DID NOT CLB EITHER ACFT LIKE THEY NORMALLY DO. ACR X GOT 3 MI IN TRAIL OF ACR Y AT SAME ALT, 15000 FT. ACR X WAS ABLE TO APPLY VISUAL SEPARATION AND CONTINUED TO CLB. I DID NOT EXPECT ACR Y TO BE SO SLOW CLBING AND HE DID NOT GO AS FAST AS A DC9 DOES NORMALLY. MINIMUM SEPARATION ACHIEVED. SHOULD NOT HAVE HAPPENED, BUT DID.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.